Valve-disk-cutting machine.



P. L. SMITH & T. Br WILLIAMS. VALVE DISK CUTTING MACHINE.

APPLICATION FILED DEO.12.1908.

980,019, I Patented Dec. 27, 1910.

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F. L. SMITH &,T. vB. WILLIAMS.

' VALVE DISK CUTTING MACHINE. APPLICATION FILED DEG.12.1908.

Patented Dec. 27, 1910 2 SHEETB-SHBBT 2.

UNITED STATES PATENT onrion.

MASSACHUSETTS, ASSIGNORS TO THE LEAVITT MACHINE COMPANY, OF ORANGE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

vALvE DIsK-CUTTlNG MACHINE.-

Specification of Letters Patent.

Patented Dec. 27, 1910.

Application filed Deoemben12, 1905. Serial No. 467,305.

To all whom it may concern:

Be it known that we, FRANK L. SMITH and THOMAS B. VVILLIAMs, citizens of the United States,, residing, respectively, at'

portable machine adapted to be operated by and is desirable.

It consists in the features of construction shown and described as indicated in the claims. I

y In the drawings :Figure 1 is a side elevation of a machine embodyin this invention. Fig. 2 is a detail sectlon at the line 22 on Fig. 4. Fig. 3 is a detail section at the line 33 on Fig. 4. Fig. 4 is a view of the tool carrier and tool holding device as seen in the direction of the arrow 4 in Fig. 1. Fig. 5 is a detail section at the line 5-5 in Fig. 2.

The drawings represent a machine which is adapted to. be mounted in a rise, A, this feature, however, being incidental only and not material to the improvements. It comprises a head-bracket, 1, having at the lower side a lug, 1 by which it is gripped to the vise, and projecting horizontally from such lug parallel to the axis of the work-carrying chuck and tail center, a bar, 2, on which the tail stock, 3, is mounted for sliding. The head, 1, is substantially the construction which is shown in Patent No. 738,854, dated September 15, 1903, being adapted for having mounted in it thebearings of a rotating shaft, 4, to which a work-holding chuck, 5, may be secured as shown in Fig. 1. The means for rotating the shaft, and for other adjustments not involved in this invention represented in the drawings are fully described in Patent No. 859,528, dated July 9, 1907.

Upon the top of the head. 1, there is mounted a sliding tool carriage,'6. for the tool carrier, said sliding tool carriage being adjustable longitudinally on the head and secured by the clamping bolt, 6, the construction in this respect being substantially that which is shown in said Patent No. 738,854. On an ofisetbracket arm, 6, of the tool carriage, 6, there is pivoted for angular adjustment of the tool in a plane radlal to the axis of the work holder shaft, a tool carrier base, 7 on which there is mounted for sliding longitudinally a tool carrier, 8, which is clamped in position to which it may be'adjusted by the pivot bolt, 9, said bolt having a flat neck, 9, which extends through the longitudinal slot, 8", of the carrier, and a head, 9", which engages the margins of the slot for clamping the carrier against the base and the base against the bracket arm, the

.tool propelling screw shaft, 13, journaled and stopped against longitudinal movement in the carrier, 8, through the head of which it protrudes for receiving the operating handle which is preferably a wheel, 14. A spring, 15, flexed about the pivot bolt, 11. engaged at one end in the traveler, 12, and having the other end stopped on the tool holder, 10, operates to swing the tool holder about the pivot bolt. 11, in direction for withdrawing the tool from the work, as, the disk, 21, which maybe held in the chuck, 5, on the shaft, 4. A stop screw, 15, project-ing" from the inner side of the tool holder, 10. and engaging in the longitudinal 'slot, 8 of the carrier, 8, limits the action of the spring. 15, for swinging the tool holder, 10, in the direction for withdrawing the tool from the work as described. The carrier, 8, it will be seen, can be adjusted about the axis of the pivot bolt, 9, to cause the path of the tool as the latter is operated by rotating the screw, 13. to be either parallel or at right angles to the axis of the shaft, 4,

be convex in radial section, a controlling cam block, E, is brought into service. This ,cam block is mounted by means of a screw,

16, upon the back'or outer side of the tool carrier, 8, opposite the position of the tool when in operation.v The securing screw, 16, takes throu h the cam block at a point nearer one edge than the other (see Fig. 3)

and the cam block can be turned so that either longitudinal edge shall be toward the tool.

the screw is toward the tool the margin of the block at that side does not overhang the tool, but when reversed the tool is overhung by that margin of the block. The overhanging margin of the cam block is formed with a concave shoulder, 16", against which the head of the tool may be stopped, and when the cam block is brought into service the tool is adjusted so that it may stop at the deepest point in the curve of this shoulder without the stop screw, 15, preventing by colliding with the edge of the slot, 8". The

cam block may be put out of service by reversing it on the securing screw, 16, as described, or by setting the tool so that when the stop screw 15 is stopped against the straight side edge of the slot, 8, the head of'the tool is away from the cam. IVhen this controlling block, is in service ,as described, it will be seen that the operation of the feed screw, 13, by means of the handle. 14, for advancing the tool in its path over 40 thework will cause the. shoulder, 16, to

operate as a cam on the protruding toolhead permitting it to be retracted 'endwise as governed by the curve of the said shoulder, thereby producing a convex or crowning valve, as clearly shown in Fig. 1. As a matter of convenience, the controlling block, E, may have at the same longitudinal edge two shoulders, facing opposite ways, of different curvature, and the block may be reversed for bringing into service the other shoulder indicated at 16'. It will be understood that the curve of the longer radius will be suitable for larger valve disks and that of the shorter radius for the smaller disks.

We claim p 4 1. In a machine of the character indicated, in combination with a rotatable work holder, a longitudinally slotted-tool carrier; a traveler thereon and means for propelling 0 it there-along in the direction of the slot; a tool holder; a pivot bolt by which the tool holder is connected to the traveler extending through said slot and constituting the means for guiding the traveler on the carrier; a spring reacting between the traveler When secured so that the edge nearer and the holder for yieldingly holding the tool on the latter away from the axis of the work holder; a cam mounted on the carrier extending in the general direction of said slot positioned for limiting the springcaused movement of the holder.

2. In a machine of the character indicated,

tuting the means of guiding the trayeler in its movement longitudinally of the carrier;

a spring flexed about such pivot bolt reacting between the traveler and the holder for yieldingly holding the tool away from the axis of the work holder, and a cam on the tool carrier extending in the general direction of the slot positioned for stopping the spring-caused movement of the holder.

3. In a machine of the character indicated, in combination with a rotatable work holder; a longitudinally slotted tool carrier; a traveler mounted thereon and means for propelling it there-along; a tool holder pivotally attached to the traveler; a spring reacting between the traveler and tool holder for yieldingly holding the tool on the latter away from the axis ofth'e work holder, said tool holder being apertured from side to side in plane radial to said axis for mounting the tool so that the latter shall protrude at both ends, and a cam mounted on the carrier extending in the general direction of the slot in the latter, positioned for encounter of the tool at the end thereof remote from the axis of the work holder for limiting said spring-caused movement of the holder.

4. In a machine of the character indicated, in combination with a rotatable work holder, a tool carrier and a traveler thereon and means for propelling it there-along; a tool holder pivoted to the traveler, the carrier having a longitudinal slot whose edge remote from the work holder axis is parallel to the direction of travel of the traveler; a stop on the tool holder for bearingagainst said edge, and a springtending to hold it yieldingly thereagainst.

5. In a machine of the character indi cated, in combination with a rotatable work holder; a tool carrier; a traveler mounted.

tion of travel of the traveler and rotatable about such pivot away from such position, and means on the pivoted holder adapted to bear on said cam.

6. In a machine of the character indicated, in combination with a rotatable work holder; a tool carrier; a traveler mounted on the carrier and means for moving it therealong'; a tool holder pivoted to the traveler; a pivot on the carrier; a cam eccentrically mounted on said pivotadapted to be pos1- tioned thereon so as to extend in the direction of travel of the traveler, and rotatable on said pivot away" from such position; a spring reacting between the traveler and the tool holder to yieldingly hold the tool on the latter away from the axis of the work holder and toward said cam, said holder-being apertured from side to side to receive the tool and hold the same with" one end extending toward the axis of the work holder, and a tool mounted in theholder with the opposite end protruding for bearing on the cam.

7 In a machine of the character indi- -cated, in combination with a rotatable work holder; a tool carrier; a' traveler mounted on the carrier and means for moving it there-along; a tool holder pivoted to the hereunto set our hands, respectively, at Ohicago, Illinois, this th day,of November,

1908, and at Orange, Massachusetts, this 4th day of December, 1908.

FRANK L. SMITH. THOMAS B. WILLIAMS.

Nitnesses for Frank L. Smith M. GERTRUDE ADY,

JULIA S. -ABBo'rr. Witnesses for Thomas -B. Williams:

JAMES D. KIMBALL, FRED A. DEXTER.

and the tool holder to yieldingly 

